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To evaluate the effectiveness of salt reduction intervention on knowledge, attitudes, and practices (KAP) regarding salt intake among residents in six provinces of China.
This cluster randomized controlled trial employed multistage cluster random sampling to select residents aged 18 to 75 years from six provinces (Hebei, Heilongjiang, Jiangxi,Hunan, Sichuan, and Qinghai). A comprehensive salt reduction intervention targeting multiple populations and settings was implemented, followed by questionnaire surveys and physical examinations. Difference-in-differences analysis combined with multilevel logistic regression models was used to assess the net intervention effect.
A total of 2 269 participants were included (control group: 1 096; intervention group: 1 173). The intervention significantly improved knowledge, including awareness of daily salt intake recommendations (OR=6.124), the association between high salt intake and hypertension (OR=2.652), the misconception that low salt intake causes weakness (OR=2.469), awareness of low-sodium salt (OR=1.650), and understanding of salt content on food labels (OR=2.486). Positive attitudes toward salt reduction also increased, including willingness to choose low-salt diets (OR=2.717) and confidence in maintaining low-salt diets (OR=2.067). Behavioral improvements were observed in the use of low-sodium salt (OR=1.774), reduced consumption of pickled foods (OR=1.300), and reduced intake of salty snacks (OR=1.997)(all P < 0.05). Sensitivity analyses yielded consistent results.
The salt reduction intervention effectively enhanced salt-related knowledge and attitudes, while promoting certain salt-reducing behaviors among residents in six provinces.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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